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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_SERVERS_CAMERA_CAMERA2_CALLBACKPROCESSOR_H
     18 #define ANDROID_SERVERS_CAMERA_CAMERA2_CALLBACKPROCESSOR_H
     19 
     20 #include <utils/Thread.h>
     21 #include <utils/String16.h>
     22 #include <utils/Vector.h>
     23 #include <utils/Mutex.h>
     24 #include <utils/Condition.h>
     25 #include <gui/CpuConsumer.h>
     26 
     27 #include "api1/client2/Camera2Heap.h"
     28 
     29 namespace android {
     30 
     31 class Camera2Client;
     32 class CameraDeviceBase;
     33 
     34 namespace camera2 {
     35 
     36 struct Parameters;
     37 
     38 /***
     39  * Still image capture output image processing
     40  */
     41 class CallbackProcessor:
     42             public Thread, public CpuConsumer::FrameAvailableListener {
     43   public:
     44     CallbackProcessor(sp<Camera2Client> client);
     45     ~CallbackProcessor();
     46 
     47     void onFrameAvailable(const BufferItem& item);
     48 
     49     // Set to NULL to disable the direct-to-app callback window
     50     status_t setCallbackWindow(sp<Surface> callbackWindow);
     51     status_t updateStream(const Parameters &params);
     52     status_t deleteStream();
     53     int getStreamId() const;
     54 
     55     void dump(int fd, const Vector<String16>& args) const;
     56   private:
     57     static const nsecs_t kWaitDuration = 10000000; // 10 ms
     58     wp<Camera2Client> mClient;
     59     wp<CameraDeviceBase> mDevice;
     60     int mId;
     61 
     62     mutable Mutex mInputMutex;
     63     bool mCallbackAvailable;
     64     Condition mCallbackAvailableSignal;
     65 
     66     enum {
     67         NO_STREAM = -1
     68     };
     69 
     70     // True if mCallbackWindow is a remote consumer, false if just the local
     71     // mCallbackConsumer
     72     bool mCallbackToApp;
     73     int mCallbackStreamId;
     74     static const size_t kCallbackHeapCount = 6;
     75     sp<CpuConsumer>    mCallbackConsumer;
     76     sp<Surface>        mCallbackWindow;
     77     sp<Camera2Heap>    mCallbackHeap;
     78     size_t mCallbackHeapHead, mCallbackHeapFree;
     79 
     80     virtual bool threadLoop();
     81 
     82     status_t processNewCallback(sp<Camera2Client> &client);
     83     // Used when shutting down
     84     status_t discardNewCallback();
     85 
     86     // Convert from flexible YUV to NV21 or YV12
     87     status_t convertFromFlexibleYuv(int32_t previewFormat,
     88             uint8_t *dst,
     89             const CpuConsumer::LockedBuffer &src,
     90             uint32_t dstYStride,
     91             uint32_t dstCStride) const;
     92 };
     93 
     94 
     95 }; //namespace camera2
     96 }; //namespace android
     97 
     98 #endif
     99